Stool



FIG. 1 is a perspective view of a stool.

FIG. 2 is a front elevation view thereof.

FIG. 3 is a rear elevation view thereof.

FIG. 4 is a right side elevation view thereof. A left side elevation view is a mirror image of the right side elevation view.

FIG. 5 is a top plan view thereof; and,

FIG. 6 is a bottom plan view thereof. 

CLAIM The ornamental design for a stool, as shown and described. 